Characteristic frequencies (top) and rms amplitudes (bottom) as a function of ν_max for our sample of LC (red/orange) and SC (blue/magenta) stars. Orange and magenta coloured symbols correspond to the lower frequency component (a₁ and b₁). Black lines indicate power law fits (see Table 2) and red open circles solar values. The insert shows the rms amplitudes of the LC sample divided by the power law fit as a function of stellar mass.